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Energy expenditure of cattle grazing on pastures of low and high availability

Published online by Cambridge University Press:  02 September 2010

O. N. di Marco ,
M. S. Aello  and
D. G. Méndez
O. N. di Marco
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias — Instituto Nacional de Tecnología Agropecuaria, E.E.A. Balcarce. CC 276 (7620) Balcarce (BA), Argentina
M. S. Aello
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias — Instituto Nacional de Tecnología Agropecuaria, E.E.A. Balcarce. CC 276 (7620) Balcarce (BA), Argentina
D. G. Méndez
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias — Instituto Nacional de Tecnología Agropecuaria, E.E.A. Balcarce. CC 276 (7620) Balcarce (BA), Argentina
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Abstract

The energy expenditure of freely grazing cattle was investigated in the National Institute of Agricultural Technology and Agricultural Science College of Balcarce, Argentina (37° 45'S, 58° 18'W), by the CO2 entry rate technique. Two experiments were carried out in the autumn in March 1994 (experiment 1) and in April 1995 (experiment 2) with animals prepared with catheters in the parotid gland (collection of saliva) and into the peritonea for infusion of a solution of 14C. Six Angus steers (259 (s.e. 11) kg) were used in experiment 1 and seven (298 (s.e. 36) kg) in experiment 2. In experiment 1 animals grazed ryegrass pastures for 5·5 h in two periods of 1·5 h in the morning and of 4 h in the afternoon and in experiment 2 animals grazed oat pasture in one period of 1 h in the morning. Twenty hours before and during the experiments a solution ofNaH14CO3 was infused at a rate of 9·4 (experiment 1) and 8·1 (experiment 2) μiCi/h for 48 h with portable peristaltic pumps carried by each animal. Saliva samples were collected at least after the first 20 h of infusion. The first sample was collected in the corral just before grazing and two samples were collected in each grazing period. Also, in experiment 1 three samples were taken during resting (noon, 1 h after grazing and the next morning). In addition, bite frequency, pasture availability, plant height, in vitro digestibility and crude protein were measured. Carbon dioxide production was calculated as the ratio between the rate of infusion of 14C (μCi/h) and the specific activity of CO2 (μCi/l CO2) in saliva samples. Bite frequency was 59 and 28 bites per min on the respective pasture of ryegrass (148 g dry matter (DM) per m2 and 10·5 cm height) and oat (228 g DM per m2 and 27 cm height). Energy expenditure (EE, kJ/h per kg M0·75) in corrals was 14·9 (experiment 1) and 14·3 (experiment 2), increasing to 22·6 (proportionately 0·52) when grazing at 59 bites per min and to 16·6 (0·16) when grazing was at 28 bites per min. One hour after grazing at 59 bites per min (experiment 1) the EE was as high as during grazing, and in the next morning (after 5·5 h) of grazing remained at 19·7 kJ/h per kg M0·75 (0·32). No differences in energy expenditure were found between periods of grazing in experiment 1. It was concluded that the increase in energy expenditure of cattle due to the activity of grazing depends on the rate of biting. Grazing for 10 h at a moderate rate may boost EE proportionately by only 0·06, however grazing at the highest rates could easily add proportionately 0·20.

Keywords

cattleenergy expendituregrazing
Type
Research Article
Information
Animal Science , Volume 63 , Issue 1 , August 1996 , pp. 45 - 50
Copyright
Copyright © British Society of Animal Science 1996

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References

Aello, M. S. and Gómez, P. O. 1984. [Time and patterns of grazing of Hereford steers on Agropyron elongatum pasture.] Revista Argentina de Production Animal 4: 533–546.Google Scholar
Agricultural Research Council. 1980. The nutrient requirements of ruminant livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Allden, W. G. and Whittaker, I. A. 1970. The determinants of herbage intake by grazing sheep: the interrelationship of factors influencing herbage intake and availability. Australian Journal of Agricultural Research 21: 755–766.CrossRefGoogle Scholar
Arnold, G. W. and Dudzinski, M. L. 1978. Ethology offree ranging domestic animals. Elsevier Scientific Publishing Company, New York.Google Scholar
Corbett, J. L., Farrell, D. J., Leng, R. A., McClymont, G. L. and Young, B. A. 1971. Determination of the energy expenditure of penned and grazing sheep from estimates of carbon dioxide entry rate. British Journal of Nutrition 26: 277–291.CrossRefGoogle ScholarPubMed
Elia, M., Fuller, N. and Murgatroyd, P. 1988. The potential use of the labelled bicarbonate method for estimating energy expenditure in man. Proceedings of the Nutrition Society 47: 247–258.CrossRefGoogle ScholarPubMed
Graham, N. McC. 1964a. Energy costs of feeding activities and energy expenditure of grazing sheep. Australian Journal of Agricultural Research 15: 969–973.Google Scholar
Graham, N. McC. 1964b. Maintenance requirements of sheep indoors and at pasture. Proceedings of the Australian Society of Animal Production 5: 272–274.Google Scholar
Havstad, K. M. and Malechek, J. C. 1982. Energy expenditure by heifers grazing Crested Wheatgrass of diminishing availability. Journal of Range Management 35: 447–450.CrossRefGoogle Scholar
Hendricksen, R. E. and Minson, D. J. 1980. The feed intake and grazing behaviour of cattle grazing a crop of Lablab purpureus cv. Rongai. Journal of Agricultural Science, Cambridge 95: 547–554.CrossRefGoogle Scholar
Herbel, C. H. and Nelson, A. B. 1966. Activities of Hereford and Santa Gertrudis cattle on a Southern New Mexico Range. Journal of Range Management 19: 173–176.CrossRefGoogle Scholar
Holmes, C. W., McLean, N. A. and Lockyer, K. J. 1978. Changes in the rate of heat production of calves during grazing and eating. New Zealand Journal of Agricultural Research 21: 107–112.CrossRefGoogle Scholar
Lathrop, W. J., Kress, D. D., Havstad, K. M., Doornbos, D. E. and Ayers, E. L. 1988. Grazing behavior of rangeland beef cows differing in milk production. Applied Animal Behaviour Science 21: 315–327.CrossRefGoogle Scholar
McBride, B. W. and Kelly, J. M. 1990. Energy cost of absorption and metabolism in the ruminant gastrointestinal tract and liver: a review. Journal of Animal Science 68: 2997–3010.CrossRefGoogle ScholarPubMed
Osuji, P. O. 1974. The physiology of eating and the energy expenditure of the ruminant at pasture. Journal of Range Management 27: 437–443.CrossRefGoogle Scholar
Ribeiro, J. M. de C. R., Brockway, J. M. and Webster, A. J. F. 1977. A note on the energy cost of walking in cattle. Animal Production 25: 107–110.Google Scholar
Sahlu, T., Jung, H. G., Neinaber, J. A. and Morris, J. G. 1988. Development and validation of a prediction equation estimating heat production by carbon dioxide entry rate technique. Journal of Animal Science 66: 2036–2043.CrossRefGoogle ScholarPubMed
Sanchez, M. D. and Morris, J. G. 1984. Energy expenditure of beef cattle grazing annual grassland. Canadian Journal of Animal Science 64 suppl: 332–334.CrossRefGoogle Scholar
Webster, A. J. F. 1989. Bioenergetics, bioengineering and growth. Animal Production 48: 249–269.Google Scholar
White, R. G. 1993. Energy expenditure of ruminant on pasture. World conference on animal production, Edmonton, Canada, pp. 475–498.Google Scholar
Whitelaw, F. G. 1974. Measurement of energy expenditure in the grazing ruminant. Proceedings of the Nutrition Society 33: 163–172.CrossRefGoogle ScholarPubMed
Young, B. A. 1970. Application of the carbon dioxide entry rate technique to measurements of energy expenditure by grazing cattle. Publication of the European Association of Animal Production 13: 237–241.Google Scholar
Young, B. A. and Corbett, J. L. 1972. Maintenance energy requirement of grazing sheep in relation to herbage availability. I. Calorimetric estimates. Australian Journal of Agricultural Research 23: 57–76.CrossRefGoogle Scholar